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How much money did Barack Obama spend on his 2012 election campaign?
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Approximately how many preventable deaths occur per year in America, due to lack of health coverage?
How much has the atmospheric concentration of carbon dioxide increased since the Industrial Revolution (taken as 1750)?
The Commitment to Development Index ranks the 27 richest nations on how much their policies benefit poor countries. Of these 27 nations, where did Canada rank on environmental protection in 2013?
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